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Ancient physicians did not distinguish between internal and external medicine, and their scholarly foundation was solid; therefore, there were diseases they could not identify. In later generations, internal and external medicine were separated: obviously internal conditions were treated by internal medicine specialists, and obviously external conditions by external medicine specialists. However, for diseases located within the abdomen where internal and external manifestations are not obvious, practitioners would each adhere to their own theories and prescribe different formulas. They would trial various herbs without effect. Mild cases would worsen, and severe cases would result in death. For such conditions, not only should surgeons be knowledgeable, but internists must also clearly differentiate them with precision. If one considers it not their responsibility and refrains from treatment, they will end up helpless at the critical moment before handing the patient over to others. There are several types of abdominal abscesses (internal carbuncles): lung abscess (Fei Yong), liver abscess (Gan Yong), stomach epigastrium abscess (Weiwuan Yong), small intestine abscess (Xiaochang Yong), large intestine abscess (Dachang Yong), and bladder abscess (Pangguang Yong). Only lung abscess, characterized by coughing up foul-smelling sputum, is relatively easy to identify. Others are often mistaken for pi-jie (obstruction syndrome forming a palpable mass), blood stasis (Yu Xue), cold-phlegm (Han Tan), or food retention (Shi Ji). With mixed and indiscriminate use of medicines, when pus finally forms, treatment is already futile. Some patients die even before pus formation occurs; both patients and doctors remain unaware of the cause of death, which is a common occurrence. Now, let us first differentiate the presentations of obstruction, blood stasis, cold-phlegm, and food retention. Obstruction and blood stasis always have a specific etiology and develop gradually; cold-phlegm presents with wandering pain and distinct phlegm symptoms; food retention has a clear history of dietary injury and resolves after bowel movement within three to five days. In contrast, the signs of these abscesses involve fixed pain that intensifies with time. The *Jin Gui Yao Lue* states: "When pulses are floating and rapid, fever is expected, yet the patient feels chilly and aversion to cold; if there is a painful area, an abscess is likely." It further states: "Pressing on the swelling reveals heat, indicating pus; no heat indicates no pus." These sentences capture the essence of internal abscesses. It also says: "In intestinal abscess, the body skin is rough like fish scales, the abdominal wall is tense, but soft upon pressure, resembling a swelling, without abdominal masses or systemic fever." For liver abscess, there is dull pain in the hypochondrium, eventually leading to vomiting of pus and blood. Small intestine abscess resembles large intestine abscess but is located slightly higher. Bladder abscess causes pain in the lower abdomen near the pubic region, with tenderness upon skin contact, and difficult, painful urination. Stomach epigastrium abscess has two types: excess and deficiency. Excess type is easier to resolve; if pus forms, recovery follows profuse vomiting of pus and blood. Deficiency type is mostly incurable; it begins with gastric pain and distension, followed by a gradual, stone-hard elevation in the epigastrium, alternating chills and fever, anorexia, tenderness on pressure, and emaciation. This is a condition caused by excessive worry injuring the Spleen, leading to death even before abscess formation. Therefore, any case with fixed abdominal pain, aversion to cold, lethargy, and inability to eat requires careful examination to prevent the development of internal abscesses. One must not delay seeking treatment from incompetent practitioners, thereby allowing the condition to progress until pus ruptures, causing self-harm and death.